206429639 has 8 divisors (see below), whose sum is σ = 222654432. Its totient is φ = 190254240.

The previous prime is 206429617. The next prime is 206429681. The reversal of 206429639 is 936924602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206429639 - 2²⁴ = 189652423 is a prime.

It is a super-2 number, since 2×206429639² = 85226391715340642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206429596 and 206429605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206429689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3419 + ... + 20604.

It is an arithmetic number, because the mean of its divisors is an integer number (27831804).

Almost surely, 2^206429639 is an apocalyptic number.

206429639 is a deficient number, since it is larger than the sum of its proper divisors (16224793).

206429639 is a wasteful number, since it uses less digits than its factorization.

206429639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24697.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 206429639 is about 14367.6594823235. The cubic root of 206429639 is about 591.0043593996.

The spelling of 206429639 in words is "two hundred six million, four hundred twenty-nine thousand, six hundred thirty-nine".